Gnu/coreutils/User-information

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20 User information

This section describes commands that print user-related information: logins, groups, and so forth.

id invocation    Print user identity.
logname invocation    Print current login name.
whoami invocation    Print effective user ID.
groups invocation    Print group names a user is in.
users invocation    Print login names of users currently logged in.
who invocation    Print who is currently logged in.